Sex: the most humorous thing you do

 
The act of sex is meant to be
Elegant and sublime
But the human frame was not designed
With such an act in mind

The doggy position is absurd
For bipeds such as us
The missionary no better
His weight will squash her bust

When she's on top he cannot swing
His hips to make a rhythm
And standing up is hard to try
Without risk of a schism

So what we really need to do
Is be light-hearted with our sex
Laugh at our antics as we fuck
Enjoy it in all respects